Patents by Inventor Adolf W. Van Vreeswyk

Adolf W. Van Vreeswyk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Underreamer with adjustable arm extension
    Patent number: 4458761
    Abstract: An underreamer having an adjustable arm extension includes a cam for urging the arm outwardly in an opened position, and a stop pin which engages a slot in the arm for limiting the maximum arm extension. An insert for the arm has a surface which overlaps a portion of the slot to establish an effective length for the slot. By changing the configuration of the surface on the insert, the arm extension can be adjusted.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: July 10, 1984
    Assignee: Smith International, Inc.
    Inventor: Adolf W. Van Vreeswyk